In a large pot, boil 2 litres of water. Add 1 tsp salt and the rice sevai. Cook for about 7 minutes till the sevai is cooked but firm. Transfer it to a seive and keep aside. Heat oil in a pan and add mustard seeds. When it splutters, add the dhals. Now add onions, ginger, green chillies, dry red chillies and curry leaves. Also add the green peas. Fry till the onions are light brown. Then add the cooked sevai, grated coconut, lime juice and salt. Fry for 2 minutes. Lastly, add the chopped coriander leaves and mix well. Tasty upma is ready!